How do you simplify $(1 - \sqrt{5}) (6 - \sqrt{5})$ $(1 - sqrt5)(6 - sqrt5)$ ?

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Answer 1 · 2018-06-14T15:07:22

$11 - 7 \sqrt{5}$ $11-7sqrt5$

(1 - sqrt5)(6 - sqrt5)

FOIL:

$6 - \sqrt{5} - 6 \sqrt{5} + {(\sqrt{5})}^{2}$ $6-sqrt5-6sqrt5+(sqrt5)^2$

$6 - 7 \sqrt{5} + 5$ $6-7sqrt5+5$

$11 - 7 \sqrt{5}$ $11-7sqrt5$

How do you simplify (1−√5)(6−√5)(1 - sqrt5)(6 - sqrt5)?